Cap for a drum



FIG. 1 is a plan view of a cap for a drum showing my new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof; and

FIG. 7 is a sectional view taken on line A--A of FIG. 1. 

The ornamental design for a cap for a drum, as shown and described. 